Methods and Compositions for Preventing or Reducing Frizzy Appearance of Hair

ABSTRACT

Compositions and methods are disclosed for preventing or reducing frizzy appearance of keratin fibers, including hair, and reducing the amount of fly-away strands of hair, particularly in humid conditions, by forming a coating on hair that is resistant to water vapors from the air or surrounding environment. The compositions comprise a combination of a hydrophobic particulate material comprising a hydrophobically surface-modified aluminum oxide and one or more hydrophobic film formers in a cosmetically acceptable vehicle.

FIELD OF INVENTION

The present invention relates to methods and compositions for preventingor reducing frizzy appearance of keratin fibers, in particular hair ofthe head, and reducing the amount of fly-away strands of hair,particularly in humid conditions. More specifically, the inventionrelates to methods and compositions for forming a coating on hair thatis resistant to humidity and water vapors from the air or surroundingenvironment.

BACKGROUND OF THE INVENTION

Consumers have utilized a number of cosmetic and personal carecompositions to enhance the look and feel of keratin fibers, such as thehair. Exposure to humid conditions can cause hair to “poof out,” havingan excessively expanded volume (i.e., “frizz volume”), or appear frizzy.This frizzy condition of hair often appears unruly and is oftencharacterized with a multiplicity of fly-away strands of hair. Frizzyhair is unsightly and makes it difficult for consumers to control andmaintain the hair style. This frizzy condition is particularlypronounced in dry, damaged, or curly hair.

A conventional approach to reducing the frizzy appearance of hair is byapplying silicones to the hair. However, these conventional compositionsare often impractical, because the large amounts necessary toeffectively reduce frizzy appearance of hair can also cause the hair tofeel greasy and tacky, thus attracting dirt, and appearing dull anddirty. Conventional compositions may also flake off or leave unsightlyresidues.

It is therefore an object of the invention to provide an aestheticallypleasing composition for application to keratin fibers, such as hair,which prevents or reduces frizzy appearance and reduces the amount offly-away strands of hair when the hair is exposed to humid conditions.It is a further object of the invention to provide methods forpreventing or reducing frizzy appearance of hair without adverselyaffecting other aesthetic properties (e.g., appearance, feel, volume,shine, softness) of the hair.

SUMMARY OF THE INVENTION

In accordance with the foregoing objectives and others, the presentinvention provides methods and compositions for preventing or reducingfrizzy appearance of hair. The compositions of the present inventionsurprisingly provide protection against humid conditions and prevent orreduce frizzy appearance of hair for extended periods of time, e.g., 24hours, 48 hours, or several days, or semi-permanently, which may lastthrough repeated hair washings. The compositions of the invention may beanhydrous or in the form of emulsions, particularly water-in-oil orwater-in-silicone emulsions.

In one aspect of the invention, a method is provided for preventing orreducing frizzy appearance of hair. The method comprises applying to thehair a composition having (a) hydrophobic particulate materialcomprising a hydrophobically surface-modified aluminum oxide having amedian particle size between about 10 nm and about 20 μm, saidhydrophobic particulate material comprising from about 0.1% to about2.0% by weight of said composition; (b) a silicone-based hydrophobicfilm former comprising from about 0.01% to about 20% by weight of saidcomposition; and (c) a cosmetically acceptable vehicle comprising asilicone fluid having a vapor pressure above about 0.01 mmHg at 20° C.The aggregate weight percentage of all non-volatile water-soluble orwater-dispersible organic constituents in the composition is less than5%, based on the entire weight of the composition. The composition mayform a substantially uniform coating on the shafts of the hair fibers.Preferably, the hydrophobic particulate material is surface modifiedwith alkylsilane groups, such as caprylylsilane. More preferably, thehydrophobic particulate material comprises fumed alumina.

In a preferred embodiment, the silicone-based hydrophobic film formermay be selected from dimethicone, amodimethicone, dimethiconol, siliconepolyurethane, silicone acrylate, or a combination thereof. Specifically,the film former may be a silicone acrylate copolymer, such as is acopolymer comprising a poly(alkyl)acrylate backbone and a dimethiconepolymer grafted to an alkyl ester side chain.

The composition may be in the form of a liquid or emulsion. Especially aproduct intended to be left on the hair and without rinsing, and may bedistributed through the hair with a brush, a comb or fingers or sprayedonto the hair. The composition may be applied to the hair when theambient relative humidity is 85% or above. Alternatively, thecomposition may be applied to the hair daily. Moreover, the compositionwhen applied to the hair may reduce or prevent the frizzy appearance ofhair after at least one shampooing or even after at least twoshampooings.

In certain embodiments, the composition may provide a contact angle witha water droplet of between 100° and 150° when applied as a thin film toa glass slide.

These and other aspects of the present invention will become apparent tothose skilled in the art after a reading of the following detaileddescription of the invention, including the appended claims.

DETAILED DESCRIPTION

All amounts provided in terms of weight percentage are relative to theentire composition unless otherwise stated. Unless otherwise provided,the term “alkyl” is intended to embrace straight-chained, branched, orcyclic hydrocarbons, particularly those having from one to 20 carbonatoms, and more particularly C₁₋₁₂ hydrocarbons. The compositions of thepresent invention can include, comprise, consist essentially of, orconsist of the components of the present invention as well as otheringredients described herein. As used herein, “consisting essentiallyof” means that the composition or component may include additionalingredients, but only if the additional ingredients do not materiallyalter the basic and novel characteristics of the claimed compositions ormethods.

As used herein, the term “keratin fiber” includes hair of the scalp,eyelashes, eyebrows, facial hair, and body hair such as hair of thearms, legs, etc. Keratin fibers are not limited to humans and alsoinclude any keratin fibers from a mammal, such as, for example, pet hairand mammalian fur.

The cosmetic compositions of the present invention will generally beanhydrous, although water-containing formulations, such as water-in-oilemulsions are within the scope of the invention. As used herein, thewater-in-oil emulsions include water-in-silicone emulsion. Whenreference is made to the weight % of a component based on the weight ofthe total composition, the total weight of the composition will beunderstood to include both the aqueous and oil phases of the emulsion.In the context of the present invention, water is considered a volatilesolvent and will thus be excluded from the limitations on hydrophiliccomponents and liquids described herein.

The inventive cosmetic compositions for reducing or preventing frizzyappearance of keratin fibers (e.g., hair) comprises a combination of ahydrophobic particulate material and a silicone-based hydrophobic filmformer for imparting a coating on keratin fibers. This novel combinationhas been found to reduced and/or prevent frizzy appearance of hair andreduce the amount of fly-away strands, particularly when the hair isexposed to humid conditions. By humid conditions it is meant that thehumidity in the surrounding air is at a level that is capable ofinducing frizzy appearance or fly-away strands of hair. In certainembodiments, the compositions are effective to prevent or reduce frizzand reduce fly-away hair at ambient relative humidity (RH) of greaterthan about 30%, greater than about 40%, greater than about 50%, greaterthan about 60%, greater than about 70%, greater than about 85%, greaterthan about 95%, or about 100% RH. It has been observed that hair treatedwith the inventive combination is more resistant to frizzy appearancethan hair treated with an equivalent amount of silicone alone. Withoutwishing to be bound by any theory, it is believed that the reduction orprevention of frizzy appearance of hair reduction in the amount offly-away strands of hair is achieved by resisting water vapor from thesurrounding air, which is more abundant in humid conditions. It is alsobelieved that the inventive combination provides a synergistic effectfor reducing or preventing frizzy appearance of keratin fibers and/orfor reducing the amount of fly-away strands of hair. In particular, itis believed that the synergistic effect may be observed in hair exposedto humid conditions. In one embodiment, the synergistic effect may beobserved in dry, damaged or curly hair.

Moreover, it is believed that the composition of the present inventionmay further prevent or reduce frizzy appearance of hair by impartinghydrophobic properties to the hair. It is contemplated that the presentinvention may impart hydrophilic properties. The contact angle is ameasure of the hydrophobicity of the surface and is the angle at which aliquid/vapor interface meets a solid surface. One method for measuringthe contact angle is by applying the composition as a film to glassslides and allowing the volatiles to evaporate. The contact angle of thethin film on the glass slide with a drop of water may be suitablymeasured using a contact angle goniometer. It is contemplated that thecompositions of the present invention are capable of providing a film ona surface, after evaporation of volatile solvents, which, in someembodiments, is characterized by a contact angle with a water dropletgreater than about 70°, about 80°, about 90°, or about 100° up to about110°, about 120°, about 130°, about 140°, or about 150°.

A first component of the cosmetic compositions of the inventioncomprises one or more particulate materials which are either hydrophobicby nature or have been hydrophobically modified by surface treatment orthe like. While not wishing to be bound by theory, it is thought thatthe particulate material provides nano-scale (1 nm to ˜1,000 nm) ormicro-scale (1 μm to ˜200 μm) surface roughness or structure on thefilm, which repels moisture from the surrounding air by providingprotuberances on which water droplets may sit, thereby reducing contactof the water with the surface at large, i.e., reducing surface adhesion.

In one embodiment, the particulate material may comprise at least onehydrophobic particulate material which has a coefficient of dynamic(kinematic) friction, μ_(k), greater than 0.5. The particulate materialmay have a chalky or gritty feel and may have substantiallynon-spherical shapes. Without wishing to be bound by any theory, it isbelieved that the substantially non-spherical shape of the high μ_(k)(i.e., greater than 0.5) particles provides nano-scale roughness to theparticles for repelling moisture. The high drag of the high μ_(k)particles also increases the substantivity of the particles against thehair.

Surface roughness can be observed or measured by AFM, SEM, and the like.The coefficient of dynamic friction may be suitably measured using, forexample, a Friction Tester (KES-SE) manufactured by Kato Tech Co., LTDusing a silicone rubber friction probe to measure a specific amount(e.g., 0.01 g) of sample evenly spread onto a ground quartz plate at aloaded weight of 50 g at 2 mm/sec.

A preferred particulate material according to the invention ishydrophobically modified aluminum oxide (Al₂O₃), also known as alumina,particularly fumed (or pyrogenic) alumina. Hydrophobically modifiedsilica (SiO₂), including fumed (or pyrogenic) silica (e.g., having aparticle size range from about 7 nm to about 40 nm and an aggregateparticle size between about 100 and about 400 nm) is also contemplatedto be particularly useful. Other notable particulate materials arehydrophobically modified metal oxides, including without limitationtitanium dioxide (TiO₂), iron oxides (FeO, Fe₂O₃ or Fe₃O₄), zirconiumdioxide (ZrO₂), tin dioxide (SnO₂), zinc oxide (ZnO), and combinationsthereof.

Advantageously, the particulate material may be one which providesadditional functionality to the compositions, including for example,ultraviolet (UV) light absorption or scattering, in the case of, forexample, titanium dioxide and zinc oxide particulates, or provideaesthetic characteristics, such as color (e.g., pigments), pearlesence(e.g. mica), or the like. The particulate material may be based, forexample, on organic or inorganic particulate pigments. Examples oforganic particulate pigments include lakes, especially aluminum lakes,strontium lakes, barium lakes, and the like. Examples of the inorganicparticulate pigments are iron oxide, especially red, yellow and blackiron oxides, titanium dioxide, zinc oxide, potassium ferricyanide(K₃Fe(CN)₆), potassium ferrocyanide (K₄Fe(CN)₆), potassium ferrocyanidetrihydrate (K₄Fe(CN)₆.3H₂O), and mixtures thereof. The particulatematerial may also be based on inorganic fillers such as talc, mica,silica, and mixtures thereof, or any of the clays disclosed in EP 1 640419, the disclosure of which is hereby incorporated by reference.

In one embodiment, particulate materials are surface-treated to impart ahydrophobic coating thereon. Hydrophobically modified particulates andmethods for preparing hydrophobically modified particulates aredescribed in, for example, U.S. Pat. No. 3,393,155 to Schutte et al.,U.S. Pat. No. 2,705,206 to Wagner et al., U.S. Pat. No. 5,500,216 toWagner et al., U.S. Pat. No. 6,683,126 to Keller et al., and U.S. Pat.No. 7,083,828 to Müller et al., U.S. Patent Pub. No. 2006/0110541 toRussell at al., and U.S. Patent Pub. No. 2006/0110542 to Dietz et al.,the disclosures of which are hereby incorporated by reference. As usedherein, a hydrophobically-modified particle is one which is renderedless hydrophilic or more hydrophobic by surface modification as comparedto the particle in the absence of surface modification.

In one embodiment, a hydrophobic particle in accordance with anembodiment of the present invention may be formed from an oxide particle(e.g., a metal oxide, silicon dioxide, etc.) having its surface coveredwith (e.g., covalently bonded to) non-polar radicals, such as forexample alkyl groups, silicones, siloxanes, alkylsiloxanes,organosiloxanes, fluorinated siloxanes, perfluorosiloxanes,organosilanes, alkylsilanes, fluorinated silanes, perfluorinated silanesand/or disilazanes and the like. The surface treatment may be any suchtreatment that makes the particles more hydrophobic. The surface of theparticles may, for example, be covalently or ionically bound to anorganic molecule or silicon-based molecule or may be adsorbed thereto,or the particle may be physically coated with a layer of hydrophobicmaterial. There is essentially no limitation on the nature of thehydrophobic treatment and alkyl, aryl, or allyl silanes, silicones,dimethicone, fatty acids (e.g., stearates), polymeric silanes may bementioned as well as fluoro and perfluoro derivatives thereof. Thehydrophobic compound may be attached to the oxide particle through anysuitable coupling agent, linker group, or functional group (e.g.,silane, ester, ether, etc). The hydrophobic compound comprises ahydrophobic portion which may be selected from for example, alkyl, aryl,allyl, vinyl, alkyl-aryl, aryl-alkyl, organosilicone, and fluoro- orperfluoro-derivatives thereof. Hydrophobic polymeric coatings includingpolyurethanes, epoxys and the like, are also contemplated to be useful.U.S. Pat. No. 6,315,990 to Farer, et al., the disclosure of which ishereby incorporated by reference, described suitable fluorosilane coatedparticulates which are formed by reacting a particulate having anucleophilic groups, such as oxygen or hydroxyl, with asilicon-containing compound having a hydrocarbyl group substituted by atleast one fluorine atom and a reactive hydrocarbyloxy group capable ofdisplacement by a nucleophile. An example of such a compound istridecafluorooctyltriethoxy silane, available from Sivento, Piscataway,N.J., under the trade name DYNASILANE™ F 8261. A preferred hydrophobiccoating according to the invention is prepared by treating an oxide, forexample, alumina, with Trimethoxycaprylyl Silane.

Any of the hydrophobically modified particulate materials described inU.S. Pat. No. 6,683,126 to Keller et al., the disclosure of which ishereby incorporated by reference herein, are also contemplated to beuseful, including without limitation those obtained by treating an oxidematerial (e.g., SiO₂, TiO₂, etc.) with a (perfluoro)alkyl-containingcompound that contains at least one reactive functional group thatundergoes a chemical reaction with the near-surface OH groups of theoxide support particle, including for example hexamethyldisilazane,octyltrimethoxysilane, silicone oil, chlorotrimethylsilane, anddichlorodimethylsilane.

In one particular preferred embodiment, the particulate material is afumed (or pyrogenic) alumina or a fumed (or pyrogenic) silica which issurface-functionalized with alkylsilyl, fluoro-alkylsilyl, orperfluoro-alkylsilyl groups, preferably with alkylsilyl groups (i.e.,surface treated with alkylsilanes). Typically, the alkylsilyl groupswill comprise C₁₋₂₀ hydrocarbons (more typically C₁₋₈ hydrocarbons)which are optionally fluorinated or perfluorinated. Such groups may beintroduced by reacting at the particle surface with silanes such asC₁₋₁₂-alkyl-trialkoxysilanes (e.g., C₁₋₁₂-alkyl-trimethoxysilanes orC₁₋₁₂-alkyl-triethoxysilanes). Preferably, the particle surface isfunctionalized with alkylsilyl groups (i.e., surface treated withalkylsilanes). More preferably, the particle surface is functionalizedand surface modified with octylsilyl groups, also known as caprylylsilylgroups, introduced by reacting the particles with, octylsilanes (orcaprylylsilanes), for example, trimethoxycaprylylsilane ortriethoxycaprylylsilane. Such particles are commonly referred, to asoctylsilane treated. In another embodiment, the oxide particle has beensurface treated with a fluoroalkylsilane, and in particular aperfluoroalkylsilane, such as a C₁₋₂₀ perfluoroalkylsilane, or moretypically a C₁₋₁₂ perfluoroalkylsilane, including an exemplaryembodiment wherein the oxide particle is surface-treated with a C₈perfluoroalkylsilane. The pigments may be prepared by treating the oxideparticle with a trialkoxyfluoroalkylsilane, such as PerfluorooctylTriethoxysilane (INCI). Because the particles are preferably fumed (orpyrogenic), the primary particle size will typically be very small,i.e., on the order of 5 nm to about 30 nm. The specific surface area ofthese particulate materials will typically, but not necessarily, rangefrom about 50 to about 300 m²/g, more typically, from about 75 to about250 m²/g, and preferably from about 100 to about 200 m²/g. A suitablehydrophobically modified alumina particulates include fumed aluminumoxide treated with octylsilane (obtained by reactingtrimethoxyoctylsilane with fumed alumina), such as AEROXIDE® Alu andAEROXIDE™ ALU C805 from Evonik Industries. That product is believed tohave an average primary particle size of about 13 nm (nanometers) and aspecific surface area (SSA) of about 100±15 m²/g. Typically, the aluminaor hydrophobically-modified alumina has not been calcined, by which ismeant that the alumina has not been heated to a high temperature, forexample, at a temperature above 1000° C. to expel volatile impurities inthe crude metal oxide. Preferably, the particulate material issubstantially free of calcined alumina, by which is meant that calcinedalumina is not deliberately added to the particulate material and theamounts are so low as to not have a measureable impact on theperformance, look or feel of the composition. More preferably, theparticulate material is free of calcined alumina.

Additional particles may be included, such as hydrophobically modifiedfumed silica. When present, suitable hydrophobically modified fumedsilica particles include, but are not limited to AEROSIL™ R 202,AEROSIL™ R 805, AEROSIL™ R 812, AEROSIL™ R 812 S, AEROSIL™ R 972,AEROSIL™ R 974; AEROSIL™ R 8200, AEROXIDE™ LE-1, AEROXIDE™ LE-2, andAEROXIDE™ LE-3 from Evonik/Degussa Corporation of Parsippany, N.J.,which are believed to be hydrophobic fumed silicas,surface-functionalized with alkylsilyl groups for hydrophobicity and aspecific surface area (SSA) of about 160±30 m2/g, about 220±30 m2/g, and100±30 m2/g, respectively. The hydrophobically modified silica materialsdescribed in U.S. Patent Pub. 2006/0110542 to Dietz et al., incorporatedherein by reference, are also contemplated to, be particularly suitable.Other optional particulates include the particulate silicone wax soldunder the trade name Tegotop™ 105 (Degussa/Goldschmidt ChemicalCorporation) and the particulate vinyl polymer sold under the nameMincor™ 300 (BASF). While silica (SiO₂) and hydrophobically-modifiedsilicas are contemplated to be useful in some embodiments, in otherembodiments the compositions will be substantially free of silica orhydrophobically-modified silica. By substantially free of silica orhydrophobically-modified silica means that these components compriseless than about 2%, preferably less than about 1%, and more preferablyless than about 0.5% by weight of the one or more particulate materials.In, other embodiments the compositions will be free of silica orhydrophobically modified silica. By “free of” is meant that none isdeliberately added and any amounts present will be so low as to notimpact the look, feel or performance of the composition.

The one or more particulate materials may also comprise particulateorganic polymers such as polytetrafluoroethylene, polyethylene,polypropylene, nylon, polyvinyl chloride, and the like which have beenformed into fine powders. Alternatively, the particulate material may bea microcapsule comprising any of the shell materials described in U.S.Patent Pub. 2005/0000531, the disclosure of which is hereby incorporatedby reference herein.

The one or more particulate materials will typically be in the form of apowder having a median particle size between about 1 nm (nanometers) andabout 1 mm (millimeters), more typically between about 5 nm and about500 μm (micrometer), preferably between about 7 nm and about 1 μm, morepreferably between about 10 nm and about 5 μm, about 20 μm, about 50 μmor about 100 μm. Where more than one particulate material is employed(e.g., modified TiO₂ and/or modified SiO₂), the median particle size ofeach powder is preferably within the foregoing ranges.

Particulate materials having median particle sizes above about 1 mm maybe too large, unless the particle itself contains surface roughness inthe appropriate size range. For example, surface treatment of a largerparticle with a polymer chain in the 20 nm range may provide acceptablesurface roughness. Roughness of the resulting films may be characterizedby the size of the primary particle, by the size of agglomeratedparticles in the aggregate, or by the distribution of particle sizes.

Typically, the one or more particulate material will typically comprisefrom about 0.01% to about 10% by weight of the total composition, moretypically from about 0.1% to about 5%, preferably from about 0.1% toabout 2.0%, more preferably from about 0.25% to about 2.0% by weight ofthe composition, and most preferably from about 0.4% to about 1.5%. Incertain embodiments, the one or more particulate material may compriseabout 0.4%, about 0.5%, about 0.6%, about 0.67%, about 0.7%, about0.75%, about 0.8%, about 0.9%, about 1.0%, about 1.25% and about 1.5% byweight of the composition.

In some embodiments, the particulate material may comprise more thanabout 5%, more than about 10%, more than about 15%, more than about 20%,more than about 25%, more than about 30%, more than about 35%, more thanabout 40%, more than about 45%, more than about 50%, more than about55%, more than about 60%, more than about 65%, more than about 70%, morethan about 75%, more than about 80%, more than about 85%, more thanabout 90%, or more than about 95% by weight of octylsilyl-functionalizedfumed alumina.

A second component of the composition of the invention comprises one ormore film formers. The film former preferably comprises a hydrophobicmaterial. The hydrophobic film former may be any hydrophobic film formersuitable for use in a cosmetic composition including, but not limitedto, hydrophobic film-forming polymers. The term film-forming polymer maybe understood to indicate a polymer which is capable, by itself or inthe presence of at least one auxiliary film-forming agent, of forming acontinuous film which adheres to a surface and functions as a binder forthe particulate material. The term “hydrophobic” film-forming polymerwill typically refer to a polymer with a solubility in water at 25° C.of less than about 1% by weight or one in which the monomeric units ofthe polymer individually have a solubility in water of less than about1% by weight at 25° C. Alternatively, a “hydrophobic” film formingpolymer may be said to be one which partitions predominately into theoctanol phase when shaken with a mixture of equal volumes of water andoctanol. By predominately is meant more the 50% by weight, butpreferably more than 75% by weight, more preferably more than 95% byweight will partition into the octanol phase. The film former ispreferably silicone based. By silicone based is meant that thehydrophobic film former comprises at least one silicone moiety, such as,for example, dimethicone, amodimethicone, dimethiconol, siliconepolyurethane, silicone acrylate or combinations thereof. Without wishingto be bound by any theory, it is believed that the reduction orprevention of frizzy appearance of hair and for reducing the amount offly-away strands of hair is achieved by the hydrophobic film formerbinding the hydrophobic particulate material in an aggregate structure,analogous to a brick and mortar wall, and thereby improving the watervapor resistance properties of hair treated with the inventivecomposition.

The film formers can be either natural or synthetic, polymeric or nonpolymeric, resins, binders, with low or high molar mass. Polymeric filmformers can be either natural or synthetic, addition or condensation,homochain or heterochain, monodispersed or polydispersed, organic orinorganic, homopolymers or copolymers, linear or branched orcrosslinked, charged or uncharged, thermoplastic or thermoset,elastomeric, crystalline or amorphous or both, isotactic or syndiotacticor atactic.

Polymeric film formers include polyolefins, polyvinyls, polacrylates,polyurethanes, silicones, silicone acrylates, polyamides, polyesters,fluoropolymers, polyethers, polyacetates, polycarbonates, polyimides,rubbers, epoxies, formaldehyde resins, and homopolymers and copolymersof and of the foregoing.

Suitable hydrophobic (lipophilic) film-forming polymers include, withoutlimitation, those described in U.S. Pat. Nos. 7,037,515 to Kalafsky, etal.; 6,685,952 to Ma et al.; 6,464,969 to De La Poterie, et al.;6,264,933 to Bodelin, et al.; 6,683,126 to Keller et al.; and 5,911,980to Samour, et al., the disclosures of which are hereby incorporated byreference.

Copolymers comprising one or more blocks selected from styrene (S),alkylstyrene (AS), ethylene/butylene (EB), ethylene/propylene (EP),butadiene (B), isoprene (I), acrylate (A) and methacrylate (MA), or acombination thereof, are contemplated to be suitable hydrophobic filmformers. Particular mention is made of Ethylene/Propylene/Styrene andButylene/Ethylene/Styrene copolymer including those sold under the tradename Versagel MD 1600 from Penreco as Gellants in isododecane (IDD).

Special mention may be made of polyalkylenes, and in particular C₂-C₂₀alkene copolymers, such as polybutene; alkylcelluloses with a linear orbranched, saturated or unsaturated C₁-C₈ alkyl radical, such asethylcellulose and propylcellulose; copolymers of vinylpyrrolidone (VP)and in particular copolymers of vinylpyrrolidone and of C₂ to C₄₀ andbetter still C₃ to C₂₀ alkene, including the copolymers of vinylpyrollidone with eicosene or dodecane monomers sold under the tradenamesGanex V 220 and Ganex V 216 Polymers (ISP Inc. of Wayne, N.J.);polyanhydride resins such as those available from Chevron under thetrade name PA-18; copolymers derived from maleic anhydride and C₃ to C₄₀alkenes such as octadecene-1; polyurethane polymers, such, as Performa V825 (New Phase Technologies) and those disclosed in U.S. Pat. No.7,150,878 to Gonzalez, et al., incorporated by reference herein; andpolymers and copolymers made from esters of vinylic acid monomers,including without limitation (meth)acrylic acid esters (also referred toas (meth)acrylates), for example, alkyl (meth)acrylates, wherein thealkyl group is chosen from linear, branched and cyclic (C₁-C₃₀) alkyls,such as, for example, (C₁-C₂₀) alkyl (meth)acrylates, and further still(C₆-C₁₀) alkyl (meth)acrylates. Among the alkyl (meth)acrylates whichmay be mentioned are those chosen from methyl methacrylate, ethylmethacrylate, butyl methacrylate, isobutyl methacrylate, 2-ethylhexylmethacrylate, lauryl methacrylate, and the like. Among the aryl(meth)acrylates which may be mentioned are those chosen from benzylacrylates, phenyl acrylate, and the like. The alkyl group of theforegoing esters may be chosen, for example, from fluorinated andperfluorinated alkyl groups, that is to say that some or all of thehydrogen atoms of the alkyl group are replaced with fluorine atoms.Mention may also be made of amides of the acid monomers such as(meth)acrylamides, for example, N-alkyl(meth)acrylamides, such as(C₁-C₂₀) alkyls, including without limitation, N-ethylacrylamide,N-t-butylacrylamide, N-t-octylacrylamide and N-undecylacrylamide. Vinylpolymers for the hydrophobic film-forming polymer may also result fromthe homopolymerization or copolymerization of at least one monomerchosen from vinyl esters, olefins (including fluoroolefins), vinylethers, and styrene monomers. For example, these monomers may becopolymerized with at least one of acid monomers, esters thereof, andamides thereof, such as those mentioned above. Non-limiting examples ofvinyl esters which may be mentioned are chosen from vinyl acetate, vinylneodecanoate, vinyl pivalate, vinyl benzoate and vinyl t-butylbenzoate.Among the olefins which may be mentioned are those chosen, for example,from ethylene, propylene, butene, isobutene, octene, octadecene, andpolyfluorinated olefins chosen, for example, from tetrafluoroethylene,vinylidene fluoride, hexafluoropropene and chlorotrifluoroethylene.Styrene monomers which may be mentioned are chosen, for example, fromstyrene and alpha-methylstyrene. The list of monomers given is notlimiting, and it is possible to use any monomer known to those skilledin the art which falls within the categories of acrylic and vinylmonomers which result in hydrophobic films. In this regard, particularmention may be made of the silicone acrylate copolymers, in particularcopolymers comprising a poly(alkyl)acrylate backbone and a dimethiconepolymer grafted to an alkyl ester side chain, such as the commerciallyavailable film former Cyclopentasiloxane (and) Acrylates/DimethiconeCopolymer (KP-545, Shin-Etsu Chemical Co., Ltd) and Methyl Trimethicone(and) Acrylates/dimethicone Copolymer (KP-549, Shin-Etsu Chemical Co.,Ltd.)

Other film formers known in the art can be used advantageously in thecomposition. These include acrylate copolymers, acrylates C₁₂₋₂₂ alkylmethacrylate copolymer, acrylate/octylacrylamide copolymers, acrylate/VAcopolymer, amodimethicone, AMP/acrylate copolymers, behenyl/isostearyl,butylated PVP, butyl ester of PVM/MA copolymers, calcium/sodium PVM/MAcopolymers, dimethicone, dimethicone copolymers,dimethicone/mercaptopropyl methicone copolymer, dimethiconepropylethylenediamine behenate, dimethiconol ethylcellulose,ethylene/acrylic acid copolymer, ethylene/MA copolymer, ethylene/VAcopolymer, fluoro C₂₋₈ alkyldimethicone, C₃₀₋₃₈ olefin/isopropylmaleate/MA copolymer, hydrogenated styrene/butadiene copolymer,hydroxyethyl ethylcellulose, isobutylene/MA copolymer, methylmethacrylate crosspolymer, methylacryloyl ethyl betaine/acrylatescopolymer, octadecene/MA copolymer, octadecene/maleic anhydridecopolymer, octylacrylamide/acrylate/butylaminoethyl methacrylatecopolymer, oxidized polyethylene, perfluoropolymethylisopropyl ether,polyethylene, polymethyl methacrylate, polypropylene, PVM/MA decadienecrosspolymer, PVM/MA copolymer, PVP, PVP/decene copolymer, PVP/eicosenecopolymer, PVP/hexadecene copolymer, PVP/MA copolymer, PVP/VA copolymer,sodium acrylate/vinyl alcohol copolymer, stearoxy dimethicone,stearoxytrimethylsilane, stearyl alcohol, stearylvinyl ether/MAcopolymer, styrene/DVB copolymer, styrene/MA copolymer, tricontanyl PVP,trimethylsiloxysilicate, VA/crotonates copolymer, VA/crotonates/vinylproprionate copolymer, VA/butyl maleate/isobornyl acrylate copolymer,vinyl caprolactam/PVP/dimethylaminoethyl methacrylate copolymer, andvinyldimethicone.

Additional non-limiting representatives of hydrophobic film-formingpolymers include at least one polycondensate chosen from polyurethanes,polyurethane-acrylics, polyurethane-polyvinylpyrrolidones,polyester-polyurethanes, polyether-polyurethanes, polyureas andpolyurea/polyurethanes. The polyurethanes may be for example, at leastone chosen from aliphatic, cycloaliphatic, and aromatic polyurethanes,polyureaurethanes, and polyurea copolymers comprising at least one of atleast one sequence of at least one aliphatic polyester origin,cycloaliphatic polyester origin, and aromatic polyester origin at leastone branched and unbranched silicone sequence, for example, frompolydimethylsiloxane and polymethylphenylsiloxane, and at least onesequence comprising fluorinated groups. Additional non-limitingrepresentatives of polycondensates may be chosen from polyesters,polyesteramides, fatty-chain polyesters, polyamides resins, epoxyesterresins, arylsulphonamide-epoxy resins, and resins resulting from thecondensation of formaldehyde with an arylsulphonamide.

The hydrophobic film may also be formed in situ by employing a resinwhich cures after application to the skin, nails, or hair, including forexample, a polydimethylsiloxane film formed by in situ hydrosilation ofa hydrosilane and an olefinic-substituted siloxane or by in situpolycondensation of alkoxy-functionalized siloxanes.

Preferred polymeric film formers include silicone polymers, acrylates,alkyl acrylates, polyurethanes, fluoropolymers such as Fluomer(polyperfluoroperhydrophenanthrene) or Flutec PP3 available from F2chemicals, and silicone acrylates such as acrylates/dimethiconecopolymers sold under the trade names KP-545 or KP 550 (Shin-Etsu).Suitable film formers include, but are not limited to, Amino BispropylDimethicone, Aminopropyl Dimethicone, Amodimethicone, AmodimethiconeHydroxystearate, Behenoxy Dimethicone, C₃₀₋₄₅ Alkyl Dimethicone, C₂₄₋₂₈Alkyl Dimethicone, C₃₀₋₄₅ Alkyl Methicone, Cetearyl Methicone, CetylDimethicone, Dimethicone, Dimethoxysilyl EthylenediaminopropylDimethicone, Hexyl Methicone, Hydroxypropyldimethicone, StearamidopropylDimethicone, Stearoxy Dimethicone, Stearyl Methicone, StearylDimethicone and Vinyl Dimethicone. Particularly preferred are siliconepolymers, including Methicone (as described by CTFA Monograph No. 1581,which is incorporated herein by reference), Dimethicones (as describedby CTFA Monograph No. 840, which is incorporated herein by reference)and Amodimethicones as described by CTFA Monograph No 189, which isincorporated herein by reference). All CTFA Monographs provided hereinare found in the International Cosmetic Ingredient Dictionary andHandbook, 12^(th) Edition (2008), and are hereby incorporated byreference.

In one embodiment of the invention, the compositions include a siliconegum. Suitable silicone gums will typically have a molecular weight offrom about 200,000 to about 600,000. Specific examples includepolydimethylsiloxane, (polydimethylsiloxane) (methylvinylsiloxane)copolymer, poly(dimethylsiloxane) (diphenyl) (methylvinylsiloxane)copolymer, dimethiconol, fluorosilicone, dimethicone, or mixturesthereof. In a preferred embodiment, the film forming silicone gum is ahigh molecular weight Dimethicone. The high molecular weightDimethicones have high viscosities and are commonly referred to asdimethicone gums. The viscosity of the silicone gum may be, withoutlimitation, form about 500,000 centistokes to about 100 millioncentistokes measured at 25° C. The high molecular weight Dimethiconesare commercially available in combination with lower molecular weightsilicones or with volatile silicones, which makes the high molecularweight Dimethicones easier to handle. A suitable mixture containing highmolecular weight Dimethicone (MW approx 500,000) is commerciallyavailable from Momentive under the trade name SF 1214.

In another preferred embodiment, the film forming polymer is a siliconeacrylate, such as that having the CTFA Monograph No 10082 and the INCIname Acylates/Dimethicone. This polymer is commercially available fromShin-Etsu Chemical Co., Ltd. under the trade name KP-544 and comprisesgrafted copolymers with an acrylic polymer backbone anddimethylpolysiloxane side chains. The same polymer is commerciallyavailable in a variety of different solvents including Isopropyl Alcohol(KP-541), Butyl Acetate (KP-543), Cyclopentasiloxane (KP-545), MethylTrimethicone (KP-549), and Isododecane (KP-550).

In another embodiment, the film forming polymer may be a siliconeurethane, such as that having the INCI Name Bis-HydroxypropylDimethicone/SMDI Copolymer and the INCI Monograph ID No. 22006. Thispolymer is commercially available from Siltech Corp. under the tradename SILMER UR-5050, which comprises the polymer in Isododecane.

Other film formers that may be employed include, without limitation,natural, mineral and/or synthetic waxes. Natural waxes are those ofanimal origin, including without limitation beeswax, spermaceti,lanolin, and shellac wax, and those of vegetable origin, includingwithout limitation carnauba, candelilla, bayberry, and sugarcane wax,and the like. Mineral waxes contemplated to be useful include, withoutlimitation ozokerite, ceresin, montan paraffin, microcrystalline,petroleum, and petrolatum waxes. Synthetic waxes include, for example,Fischer Tropsch (FT) waxes and polyolefin waxes, such as ethylenehomopolymers, ethylene-propylene copolymers, and ethylene-hexenecopolymers. Representative ethylene homopolymer waxes are commerciallyavailable under the tradename POLYWAX® Polyethylene (Baker HughesIncorporated). Commercially available ethylene-α-olefin copolymer waxesinclude those sold under the tradename PETROLITE® Copolymers (BakerHughes Incorporated). Another wax that is suitable is dimethiconolbeeswax available from Noveon as ULTRABEE™ dimethiconol ester.

In some embodiments, it may be desirable to add a hydrophilic orwater-soluble film former (e.g., cellulosics, polysaccharides,polyquaterniums (such as polyquaternium-37 (INCI), etc.) to thecomposition to improve spreading, emulsion stability, aesthetic look andfeel, etc. While less preferred, it is within the scope of the inventionto include such hydrophilic or water-soluble film formers. There is norestriction on the amount of hydrophilic or water-soluble film former,although at high levels (e.g., greater than 20% by weight based on thetotal weight of film former) it may be necessary to increase the ratioof hydrophobic particulate to film former to counter the reduction insurface hydrophobicity. In some embodiments, the collective weightpercentage of hydrophilic or water-soluble film formers will be lessthan about 20%, preferably less than about 15%, more preferably lessthan about 10%, and more preferred still, less than about 5% by weightbased on the total weight of all film formers. In a preferredembodiment, hydrophilic film formers will comprise less than about 2% byweight of the total weight of film formers in the composition. In oneembodiment, the composition is substantially free of water-soluble filmformers by which is meant that the composition comprise less than 2% byweight, preferably, less than 1% by weight, and more preferred still,less than 0.5% by weight of the one or more film formers. In oneembodiment the composition does not contain a hydrophilic film former.

Combinations of any of the foregoing film formers are also contemplatedto be suitable, including combinations or polymeric and non-polymericfilm formers.

The film former will comprise from about 0.01% to about 20% by weight ofthe composition, and more typically will comprise from about 0.25% toabout 15%, and preferably from about 1 to 12%, more preferably from 1.5%to about 10%, and more preferred still about 3% to about 8% by weight ofthe composition. Generally, the weight ratio of the one or morehydrophobic particulate material to one or more film formers will befrom about 1:1 to about 1:100, about 1:1.25 to about 1:75, about 1:1.5to about 1:50, about 1:1.75 to about 1:25, or about

In certain embodiments, the composition will comprise a siliconeacrylate film former in addition to a silicone gum film former. Thesilicone acrylate film former and the silicone gum film former may eachindependently comprise from about 0.01% to about 20% by weight of thecomposition, and more typically will comprise from about 0.25% to about15%, and preferably from about 1.0% to about 10%, and more preferably,from 1.5% to about 8%, and more preferred still about 3% to about 5% byweight of the composition.

The inventive compositions will typically comprise a cosmeticallyacceptable vehicle. By “cosmetically acceptable” is meant that thevehicle is safe for contact with a human integument. The vehicle maycomprise a liquid, comprising a single phase, a dual-phase system, or anemulsion. Emulsions include oil-in-water, silicone-in-water,water-in-oil, water-in-silicone, and the like. Where the product isintended as a spray, it may be desirable to employ a single phasevehicle, or a dual phase vehicle comprising an aqueous phase and an oilphase, the oil phase comprising a silicone oil. When formulated as anemulsion, an emulsifier is typically included. In other embodiments, thecomposition is substantially free or free of an emulsifier. Bysubstantially free of an emulsifier is meant that no emulsifier isdeliberately added to the composition and the amounts present, if any,are so low as to not have a measureable impact on the stability of anemulsion.

In one embodiment, the vehicle may comprise a volatile solvent.Typically, a volatile solvent may have a vapor pressure of above about0.01 mmHg at 20° C. Volatile solvents may include volatile C₅₋₁₂hydrocarbons (e.g., isododecane), aromatic hydrocarbons (e.g., xylenes,toluene, etc.), ketones (e.g., actetone, methylethyl ketone, etc.),ethers (e.g., diethyl ether, methylethyl ether, etc.),perfluorohydrocarbons, hydrofluoroethers, Freons, volatile silicones(e.g., cyclopentasiloxane), lower alcohols (e.g., ethanol, isopropylalcohol, etc.), esters of acetic acid (e.g., ethylacetate, butylacetate,etc.) and the like. Preferred volatile solvents will be cosmeticallyacceptable.

Volatile silicones are a preferred volatile solvent. By volatilesilicone is meant that the oil readily evaporates at ambienttemperatures. Typically, volatile silicone oils will exhibit a vaporpressure ranging from about 1 Pa to about 2 kPa at 25° C.; willpreferably have a viscosity of from about 0.1 to about 10 centistokes,preferably about 5 centistokes or less, more preferably about 2centistokes or less, at 25° C.; and will boil at atmospheric pressure atfrom about 35° C. to about 250° C. Volatile silicones include cyclic andlinear volatile dimethylsiloxane silicones, including 0.5 cstdimethicone, 0.65 cst dimethicone, 1 cst dimethicone, and 1.5 cstdimethicone. In one embodiment, the volatile silicones may includecyclodimethicones, including tetramer (D4), pentamer (D5), and hexamer(D6) cyclomethicones, or mixtures thereof. Suitable dimethicones areavailable from Dow Corning under the name Dow Corning 200® Fluid andhave viscosities ranging from 0.65 to 5 centistokes. Suitable non-polar,volatile liquid silicone oils are disclosed in U.S. Pat. No. 4,781,917,herein incorporated by reference in its entirety. Additional volatilesilicones materials are described in Todd et al., “Volatile SiliconeFluids for Cosmetics,” Cosmetics and Toiletries, 91:27-32 (1976), hereinincorporated by reference in its entirety. Linear volatile siliconesgenerally have a viscosity of less than about 5 centistokes at 25° C.,whereas the cyclic silicones have viscosities of less than about 10centistokes at 25° C. Examples of volatile silicones of varyingviscosities include Dow Corning 200, Dow Corning 244, Dow Corning 245,Dow Corning 344, and Dow Corning 345, (Dow Corning Corp.); SF-1204 andSF-1202 Silicone Fluids (G.E. Silicones), GE 7207 and 7158 (GeneralElectric Co.); and SWS-03314 (SWS Silicones Corp.). Linear, volatilesilicones include low molecular weight polydimethylsiloxane compoundssuch as methyltrimethicone, trisiloxane, hexamethyldisiloxane,octamethyltrisiloxane, decamethyltetrasiloxane, anddodecamethylpentasiloxane to name a few. Particularly preferred volatilesilicones of the present invention include cyclomethicone tetramer,cyclomethicone pentamer, cyclomethicone hexamer, trisiloxane, methyltrimethicone or combinations thereof.

Lower alcohol solvents, including methanol, ethanol (also known as ethylalcohol), propanol, and isopropanol, are also contemplated to be useful.Ethanol is particularly preferred due to its high volatility and lowtoxicity. Preferably, the ethanol is anhydrous ethanol, such as SDAlcohol 40 from Exxon. In other embodiments, the compositions comprisesless than about 50%, less than about 40%, less than about 30%, less thanabout 20%, less than about 10%, or less than about 5% by weight ethanol.In some embodiments, the compositions comprises less than about 2.5%,less than about 1%, or less than about 0.5% by weight ethanol. In otherembodiments, the compositions are substantially free of ethanol, bywhich is meant that no ethanol is deliberately added and the amountspresent, if any, are so low as to not have a measureable impact on thelook, feel, or performance of the product. In another embodiment, thecomposition is free of ethanol.

Among the volatile C₅₋₁₂ hydrocarbons, special mention may be made ofisododecane which is available under the trade name Permethyl-99A(Presperse Inc.). Suitable fluorinated solvents include, withoutlimitation, perfluoroethers, perfluorodecalin, perfluoromethyldecalin,perfluorohexane, perfluoromethylcyclohexane,perfluorodimethylcyclohexane, perfluoroheptane, perfluorooctane,perfluorononane, and perfluoromethylcycopentane, for example.

In a preferred embodiment, the solvent will comprise a combination of avolatile silicone, preferably cyclomethicone pentamer, and anhydrousethanol. Preferably, the volatile silicone (cyclomethicone pentamer)will comprise from about 1% to about 99% and the ethanol will comprisefrom about 1% to about 99% by weight of the solvent system. Moreparticularly, the volatile silicone (cyclomethicone pentamer) willcomprise from about 50% to about 99% and the ethanol will comprise fromabout 1% to about 50% by weight of the solvent system. In a preferredembodiment, volatile silicone (cyclomethicone pentamer) will comprisefrom about 70% to about 90% and ethanol will comprise from about 10% toabout 30% by weight of the solvent system.

In a further embodiment, the compositions according to the inventionwill comprise ethanol, preferably anhydrous, in combination with one ormore solvents having a vapor pressure at 25° C. which is less than thevapor pressure of ethanol. In another embodiment, the compositionsaccording to the invention will comprise ethanol, preferably anhydrous,in combination with one or more solvents having a vapor pressure at 25°C. which is greater than the vapor pressure of ethanol.

Anhydrous Formulations

The compositions of the invention may be provided as anhydrous orsubstantially anhydrous formulations. By “substantially anhydrous” ismean that the weight percentage of water in the composition is less thanabout 0.5%, preferably less than 0.25%, and most preferably less thanabout 0.1% by weight. Typically, the anhydrous compositions aresubstantially free of water by which is meant that water is notdeliberately added to the compositions and the level of water is no morethan would be expected based on the absorption of water from the air.The anhydrous composition will typically comprise a volatile hydrophobicsolvent, such as volatile hydrocarbons, volatile silicones, and thelike.

Water-in-Oil Emulsions

The compositions according to the invention may be formulated aswater-in-oil emulsions. These emulsions comprise an oil-containingcontinuous phase and an aqueous discontinuous phase.

The oil-containing phase will typically comprise from about 10% to about99%, from about 20% to about 85%, or from about 30% to about 75% byweight, based on the total weight of the composition, and the aqueousphase will typically comprise from about 1% to about 90%, from about 5%to about 80%, from about 10% to about 70%, or from about 15% to about60% by weight of the composition. In one embodiment, the oil containingphase and the aqueous phase may comprise approximately equal percentagesof the total weight of the emulsion.

The oil-containing phase may be composed of a single oil or mixtures ofdifferent oils. Essentially any oil is contemplated to be useful,although highly hydrophobic oils are preferred. Suitable non-limitingexamples include vegetable oils; esters such as octyl palmitate,isopropyl myristate and isopropyl palmitate; ethers such as dicaprylether; fatty alcohols such as cetyl alcohol, stearyl alcohol and behenylalcohol; isoparaffins such as isooctane, isododecane and isohexadecane;silicone oils such as dimethicones, cyclic silicones, and polysiloxanes;hydrocarbon oils such as mineral oil, petrolatum, isoeicosane andpolyisobutene; natural or synthetic waxes; and the like.

Suitable hydrophobic hydrocarbon oils may be saturated or unsaturated,have an aliphatic character and be straight or branched chained orcontain alicyclic or aromatic rings. Hydrocarbon oils include thosehaving 6-20 carbon atoms, more preferably 10-16 carbon atoms.Representative hydrocarbons include decane, dodecane, tetradecane,tridecane, and C₈₋₂₀ isoparaffins. Paraffinic hydrocarbons are availablefrom Exxon under the ISOPARS trademark, and from the PermethylCorporation. In addition, C₈₋₂₀ paraffinic hydrocarbons such as C₁₂isoparaffin (isododecane) manufactured by the Permethyl Corporationhaving the tradename Permethyl 99A™ are also contemplated to besuitable. Various commercially available C₁₆ isoparaffins, such asisohexadecane (having the tradename Permethyl R™) are also suitable.Examples of preferred volatile hydrocarbons include polydecanes such asisododecane and isodecane, including for example, Permethyl-99A(Presperse Inc.) and the C₇-C₈ through C₁₂-C₁₅ isoparaffins such as theIsopar Series available from Exxon Chemicals. A representativehydrocarbon solvent is isododecane.

Critically, the emulsions have little or no non-volatile hydrophilicconstituents, including some conventional humectants. Components such asglycerin and polyols, including propylene glycol, ethoxydiglycol,glycerin, butylene glycol, pentylene glycol and hexylene glycol shouldbe eliminated or should be kept at levels such that the non-volatilehydrophilic constituents, such as non-volatile water soluble orwater-dispersible organic constituents, in the aggregate, do not exceed15% by weight and preferably will be less than 10%, less than 5%, lessthan 2%, or less than 1% by weight, based on the entire weight of thecomposition. Glycerin has been found to be particularly detrimental andshould therefore be maintained at levels below 2% by weight, or below 1%by weight, or eliminated altogether.

It has been found that the selection and amount of emulsifier isimportant for obtaining films which provide water vapor resistantproperties. Because the emulsifier itself may be deleterious to theformation of a water vapor resistant film or adversely affect thedurability of the performance through repeated hair washings, thecompositions preferably have the lowest level of emulsifier capable ofproducing a stable emulsion. The amount of emulsifier will typically befrom about 0.001 to about 10% by weight, but preferably will range fromabout 0.01 to about 5% by weight, more preferably from 0.1 to 3%, andmost preferably about 0.25 to about 1% by weight, based upon the totalweight of the composition. In other embodiments, the emulsifier may beabsent. In compositions where the emulsifier is extremely low or absent,the composition may be of the “shake well” type such that thecomposition forms a transient emulsion when it is vigorously mixed orshaken, and separates into two distinct phases when left undisturbedover a period of time in a container.

For water in oil emulsions, the emulsifier itself should be of lowHydrophilic-Lipophilic Balance (HLB), preferably below 10, morepreferably below 8.5. While combinations of more than one emulsifier arecontemplated to be within the scope of the invention, each suchemulsifier, individually, should be of low HLB. Therefore, the use ofhigh and low HLB emulsifiers, which in combination give low HLB (e.g.,less than 8.5), is less desirable because even if the combined HLB ofthe system is below 8.5, the contribution of the higher HLB emulsifierwill be detrimental to the formation of a water vapor resistant film. Ifpresent, the amount of emulsifier having an HLB above 10 will be lessthan 1% by weight, more preferably less than 0.5% by weight, and morepreferred still, less than 0.2% by weight.

Where the emulsifier is of the polyethoxylated type (e.g.,polyoxyethylene ethers or esters) comprising chains of the form—(CH₂CH₂O)_(n)—, it is preferred that n be less than 20, more preferablyless than 10, most preferably less than 5. Propoxylated emulsifiers arealso contemplated to be suitable. Propoxylated emulsifiers alsopreferably having less than 20, more preferably less than 10, mostpreferably less than 5 propylene oxide repeat units.

Emulsifiers that can be used in the composition of the present inventioninclude, but are not limited to, one or more of the following: sorbitanesters; polyglyceryl-3-diisostearate; sorbitan monostearate, sorbitantristearate, sorbitan sesquioleate, sorbitan monooleate; glycerol esterssuch as glycerol monostearate and glycerol monooleate; polyoxyethylenephenols such as polyoxyethylene octyl phenol and polyoxyethylene nonylphenol; polyoxyethylene ethers such as polyoxyethylene cetyl ether andpolyoxyethylene stearyl ether; polyoxyethylene glycol esters;polyoxyethylene sorbitan esters; dimethicone copolyols; polyglycerylesters such as polyglyceryl-3-diisostearate; glyceryl laurate;Steareth-2, Steareth-10, and Steareth-20, to name a few. Additionalemulsifiers are provided in the INCI Ingredient Dictionary and Handbook11th Edition 2006, the disclosure of which is hereby incorporated byreference.

An example of a very low HLB emulsifier contemplated to be suitableaccording to the invention is Span 83, a sesquiester of monooleate anddioleate at a 2:1 molar ratio which has an HLB of 3.7. Sorbitanmonostearate (INCI) is another suitable emulsifier, having an HLB valueof 4.7.

The aqueous phase may include one or more additional solvents,preferably volatile solvents, including lower alcohols, such as ethanol,isopropanol, and the like. The volatile solvents, when present in theaqueous phase, will typically comprise from about 0.1% to about 75% byweight of the aqueous phase, more typically up to about 35% by weight,and preferably up to about 15% by weight. The water and optionalvolatile solvents are contemplated to enhance the formation of a watervapor resistant film because the particulates will tend to be pushed tothe surface of the film as the solvents evaporate.

Water-in-Silicone Emulsion

One type of water-in-oil emulsion that has been found to be useful is awater-in-silicone emulsions having a silicone oil-containing continuousphase and an aqueous discontinuous phase.

Typically, water is incorporated into the composition to form awater-in-silicone emulsion for the purpose of dissolving water solubleingredients into the composition. The water soluble may include watersoluble polymer amongst other that impart additional aesthetic benefits,e.g., look and/or feel to the hair. Preferably, the amount of wateradded to the composition will be at a minimum that is required ornecessary to dissolve the desired water soluble ingredient.Alternatively, water may be incorporated into the composition for thepurpose of forming a water-in-silicone emulsion and increasing theviscosity of the composition. Preferably, the amount of water introducedis at a minimum amount necessary to achieve the desired viscosity.

The silicone-containing phase will typically comprise from about 10% toabout 99%, from about 20% to about 85%, or from about 30% to about 75%by weight, based on the total weight of the composition, and the aqueousphase will typically comprise from about 1% to about 90%, from about 5%to about 80%, from about 10% to about 70%, or from about 15% to about60% by weight of the composition. In one embodiment, the siliconecontaining phase and the aqueous phase may comprise approximately equalpercentages of the total weight of the emulsion.

Preferably, only the minimum amount of water necessary to achieve thedesired functions, such as dissolving water soluble ingredients orincreasing viscosity of the composition, should be introduced. Forexample, if a lotion consistency is desired, and the compositionincludes low amounts of water soluble polymers in its formula, between10% and 25% of water will usually suffice. In another example, if acreme consistency is desired for the composition, or if large amounts ofwater soluble ingredients (e.g., actives/polymers/etc.) are desired,between about 25% and about 50% of water may be necessary. Thesilicone-containing or oil-containing phase may vary depending on theamount of aqueous phase present in the composition.

The silicone oil phase may include volatile silicone oils, non-volatilesilicone oils, and combinations thereof. By volatile silicone oil ismeant that the oil readily evaporates at ambient temperatures.Typically, volatile silicone oils will exhibit a vapor pressure rangingfrom about 1 Pa to about 2 kPa at 25° C.; will preferably have aviscosity of from about 0.1 to about 10 centistokes, preferably about 5centistokes or less, more preferably about 2 centistokes or less, at 25°C.; and will boil at atmospheric pressure at from about 35° C. to about250° C.

Volatile silicones useful for the silicone oil phase of thewater-in-silicone emulsion include cyclic and linear volatiledimethylsiloxane silicones. In one embodiment, the volatile siliconesmay include cyclodimethicones, including tetramer (D4), pentamer (D5),and hexamer (D6) cyclomethicones, or mixtures thereof. Particularmention may be made of the volatile cyclomethicone-hexamethylcyclotrisiloxane, octamethyl-cyclotetrasiloxane, anddecamethyl-cyclopentasiloxane. Suitable volatile dimethicones areavailable from Dow Corning under the name Dow Corning 200® Fluid andhave viscosities ranging from about 0.65 to about 5 centistokes.Suitable non-polar, volatile liquid silicone oils are disclosed in U.S.Pat. No. 4,781,917, herein incorporated by reference in its entirety.Additional volatile silicones materials are described in Todd et al.,“Volatile Silicone Fluids for Cosmetics”, Cosmetics and Toiletries,91:27-32 (1976), herein incorporated by reference in its entirety.Linear volatile silicones generally have a viscosity of less than about5 centistokes at 25° C., whereas the cyclic silicones have viscositiesof less than about 10 centistokes at 25° C. Examples of volatilesilicones of varying viscosities include Dow Corning 200, Dow Corning244, Dow Corning 245, Dow Corning 344, and Dow Corning 345, (Dow CorningCorp.); SF-1204 and SF-1202 Silicone Fluids (G.E. Silicones), GE 7207and 7158 (General Electric Co.); and SWS-03314 (SWS Silicones Corp.).Linear, volatile silicones include low molecular weightpolydimethylsiloxane compounds such as hexamethyldisiloxane,octamethyltrisiloxane, decamethyltetrasiloxane, anddodecamethylpentasiloxane to name a few.

Non-volatile silicone oils will typically comprise polyalkylsiloxanes,polyarylsiloxanes, polyalkylarylsiloxanes, or mixtures thereof.Polydimethylsiloxanes are preferred non-volatile silicone oils. Thenon-volatile silicone oils will typically have a viscosity from about 10to about 60,000 centistokes at 25° C., preferably between about 10 andabout 10,000 centistokes, and more preferred still between about 10 andabout 500 centistokes; and a boiling point greater than 250° C. atatmospheric pressure. Non limiting examples include dimethylpolysiloxane (dimethicone), phenyl trimethicone, anddiphenyldimethicone.

The volatile and non-volatile silicone oils may optionally besubstituted will various functional groups such as alkyl, aryl, aminegroups, vinyl, hydroxyl, haloalkyl groups, alkylaryl groups; andacrylate groups, to name a few.

The water-in-silicone emulsion is emulsified with a nonionic surfactant(emulsifier). Suitable emulsifiers includepolydiorganosiloxane-polyoxyalkylene block copolymers, including thosedescribed in U.S. Pat. No. 4,122,029, the disclosure of which is herebyincorporated by reference. These emulsifiers generally comprise apolydiorganosiloxane backbone, typically polydimethylsiloxane, havingside chains comprising -(EO)_(m)- and/or -(PO)_(n)- groups, where EO isethyleneoxy and PO is 1,2-propyleneoxy, the side chains being typicallycapped or terminated with hydrogen or lower alkyl groups (e.g., C₁₋₆,typically C₁₋₃). The side chains will preferably comprise 50 EO and/orPO units or less (e.g., m+n=<50), preferably 20 or less, and morepreferably 10 or less. In addition to the alkoxylated side chain, thesilicone emulsifier may also comprise alkyl chains pendant from thesilicone backbone. Other suitable water-in-silicone emulsifiers aredisclosed in U.S. Pat. No. 6,685,952, the disclosure of which is herebyincorporated by reference herein. Commercially availablewater-in-silicone emulsifiers include those available from Dow Corningunder the trade designations 3225C and 5225C FORMULATION AID; SILICONESF-1528 available from General Electric; ABIL EM 90 and EM 97, availablefrom Goldschmidt Chemical Corporation (Hopewell, Va.); and the SILWET™series of emulsifiers sold by OSI Specialties (Danbury, Conn.).

Examples of water-in-silicone emulsifiers include, without limitation,PEG/PPG-18/18 dimethicone (trade name 5225C, Dow Corning), PEG/PPG-19/19dimethicone (trade name BY25-337, Dow Corning), Cetyl PEG/PPG-10/1dimethicone (trade name Abil EM-90, Goldschmidt Chemical Corporation),PEG-12 dimethicone (trade name SF 1288, General Electric), laurylPEG/PPG-18/18 methicone (trade name 5200 FORMULATION AID, Dow Corning),PEG-12 dimethicone crosspolymer (trade name 9010 and 9011 siliconeelastomer blend, Dow Corning), PEG-10 dimethicone crosspolymer (tradename KSG-20, Shin-Etsu), and dimethicone PEG-10/15 crosspolymer (tradename KSG-210, Shin-Etsu).

It has been found that the selection and amount of emulsifier isimportant for obtaining films which provide water vapor resistantproperties. Because the emulsifier itself may be deleterious to theformation of a water vapor resistant film or adversely affect thedurability of the performance through repeated hair washings, thecompositions preferably have the lowest level of emulsifier capable ofproducing a stable emulsion. The water-in-silicone emulsifiers typicallywill be present in the composition in an amount from about 0.001% toabout 10% by weight, in particular in an amount from about 0.01% toabout 5% by weight, and more preferably, below 1% by weight. In otherembodiments, the emulsifier may be absent. In compositions where theemulsifier is extremely low or absent, the composition may be of the“shake well” type such that the composition forms a transient emulsionwhen it is vigorously mixed or shaken, and separating into two distinctphases when left undisturbed over a period of time.

In one embodiment of the invention, the one or more hydrophobicparticulate material and the film former are first dispersed ordissolved in the oil, or silicone phase of a water-in-oil orwater-in-silicone emulsion. The oil or silicone is subsequently mixedwith the aqueous phase to form the emulsion. The emulsions willtypically have the hydrophobic film formers and any hydrophobic pigmentsdispersed or dissolved predominantly in the oil or silicone phase.

In some embodiments, it has been found desirable to include one or moreagents that enhance the shine of hair treated with the compositions ofthe invention. The hydrophobic particulate materials, particularly thehydrophobically-modified fumed oxides such as alumina and silica, imparta matte finish to the hair which may be undesirable from a consumersperspective. It has been discovered that shine can be restored to thehair, without sacrificing the water-resistance, by including one of moreagents which modify the shine of hair. The shine-enhancing agent ispreferably hydrophobic and is also preferably solid at room temperaturesuch that the particulate material does not become covered when thecomposition is applied to the hair. For example, lens-shaped particlessuch as hemi-spherical PMMA have been found suitable for impartingshine. One such commercially available material is a hemi-sphericalmethyl methacrylate crosspolymer sold under the trade name 3D Tech PW(Plain) XP (Kobo). Other suitable shine enhancers includephenylpropyldimethylsiloxysilicate, polybutene, polyisobutene,hydrogenated polyisobutene.

Silicone fluids, such as aryl-substituted siloxanes having highrefractive indices are also useful as shine enhancers. Particularmention may be made of Phenyltrimethicone, which is available under thetrade names SCI-TEC PTM 100 (ISP) and PDM20 (Wacker-Belsil), andTrimethylsiloxyphenyl Dimethicone (INCI name), which is available underthe trade name PDM 1000 (Wacker-Belsil). The PDM20 material has arefractive index of 1.437 at 25° C. The PDM 1000 material has arefractory index of 1.461 at 25° C. Another suitable silicone fluid istrimethylsiloxyphenyl dimethicone. In general, any aryl-substitutedsilicone having a refractive index of greater than 1.4 at 25° C. iscontemplated to be suitable for restoring shine to hair treated with theinventive compositions. Phenyl silicones such as pentaphenyl trimethyltrisiloxane or tetraphenyl tetramethyl trisiloxane, commerciallyavailable as HRI fluids from Dow corning HRI, are also useful forenhancing shine. Certain organic compounds, such as octyl methoxycinnamate, may also be used to enhance shine.

The shine enhancer is typically present from about 0.01% to about 5% byweight of the total composition. More typically, the shine enhancercomponent will comprise from about 0.05% to about 2.5% by weight of thecomposition. Preferably, the shine enhancer will comprise from about0.1% to about 1.5% by weight of the composition, including embodimentswherein the shine enhancer is present at about 0.1%, 0.3%, 0.5%, 0.75%,1%, 1.25%, or 1.5% by weight of the composition.

In addition to the foregoing, the compositions according to theinvention may comprise additional pigments, pearlescents, and/orcolorants to combat the white appearance of fumed alumina or fumedsilica or otherwise to impart a desired color to the hair, provided thatsuch components do not undesirably detract from the product performance.Inorganic pigments include without limitation titanium dioxide, zincoxide, iron oxides, chromium oxide, ferric blue, and mica; organicpigments include barium, strontium, calcium or aluminium lakes,ultramarines, and carbon black; colorants include without limitation D&CGreen #3, D&C Yellow #5, and D&C Blue #1. Pigments and/or colorants maybe coated or surface treated with one or more compatibilizers to aid indispersion in the solvent. Preferred pigments and/or colorants are thosesurface treated to render them hydrophobic.

Preferred colorants include Iron Oxides, Black Oxide of Iron, Brown IronOxide, CI 77489, CI 77491, CI 77492, CI 77499, Iron Oxide Red10-34-PC-2045, Pigment Black 11, Pigment Brown 6, Pigment Brown 7,Pigment Red 101, Pigment Red 102, Pigment Yellow 42, Pigment Yellow 43,Red Iron Oxide, Synthetic Iron Oxide, and Yellow Iron Oxide.

Various fillers and additional components may be added. Suitable fillersinclude without limitation silica, treated silica, talc, zinc stearate,mica, kaolin, Nylon powders such as Orgasol™, polyethylene powder,Teflon™, boron nitride, copolymer microspheres such as Expancel™ (NobelIndustries), Polytrap™ (Dow Corning) and silicone resin microbeads(Tospearl™ from Toshiba), and the like.

Additional pigment/powder fillers include, but are not limited to,inorganic powders such as gums, chalk, Fuller's earth, kaolin, sericite,muscovite, phlogopite, synthetic mica, lepidolite, biotite, lithia mica,vermiculite, aluminum silicate, starch, smectite clays, alkyl and/ortrialkyl aryl ammonium smectites, chemically modified magnesium aluminumsilicate, organically modified montmorillonite clay, hydrated aluminumsilicate, aluminum starch octenyl succinate barium silicate, calciumsilicate, magnesium silicate, strontium silicate, metal tungstate,magnesium, silica alumina, zeolite, barium sulfate, calcined calciumsulfate (calcined gypsum), calcium phosphate, fluorine apatite,hydroxyapatite, ceramic powder, metallic soap (zinc stearate, magnesiumstearate, zinc myristate, calcium palmitate, and aluminum stearate),colloidal silicone dioxide, and boron nitride; organic powder such aspolyamide resin powder (nylon powder), cyclodextrin,polymethylmethacrylate powder (PMMA), copolymer powder of styrene andacrylic acid, benzoguanamine resin powder, poly(ethylene tetrafluoride)powder, and carboxyvinyl polymer, cellulose powder such as hydroxyethylcellulose and sodium carboxymethyl cellulose, ethylene glycolmonostearate; inorganic white pigments such as magnesium oxide; andstabilizers/rheology modifiers, for example, Bentone Gel and RheopearlTT2. Other useful powders are disclosed in U.S. Pat. No. 5,688,831, thedisclosure of which is hereby incorporated by reference.

The aggregate amount of all such additional pigments, colorants, andfillers is not particularly restricted provided that the water vaporresistance and reduction of frizzy appearance of treated hair is notcompromised. Typically, all additional pigments, colorants, fillers,etc., if present, will collectively comprise from about 0.1% to about 5%of the total composition, but more typically will comprise from about0.1% to about 2% by weight of the composition.

The compositions of the invention may optionally comprise other activeand inactive ingredients typically associated with hair care products.The nature of these other ingredients and their amounts shouldpreferably be suitable for formulating a stable hair care product whichforms a hydrophobic film on keratin fibers. Preferably, these otheringredients include at least one bioactive ingredient for improving thekeratin fiber. It is within the skill in the art to choose additionalactive and/or inactive ingredients for a hair care product. Suitableother ingredients include, but are not limited to, amino acids,antioxidants, chelating agents, colorants, emollients, emulsifiers,excipients, fillers, fragrances, gelling agents, humectants, minerals,moisturizers, photostabilizing agents (e.g., UV absorbers),preservatives, stabilizers, staining agents, surfactants, viscosityand/or rheology modifiers, vitamins, waxes and mixtures thereof. It iscontemplated that the inventive hair care product of the presentinvention can also include anti-dandruff, deodorant, sunscreen and/orantiperspirant ingredients. If present, the levels of such additionalcomponents should be judiciously selected so as not to adversely impactthe ability of the compositions to reduce or prevent frizzy appearanceof hair. Collectively, all such additional components suitably willcomprise less than 5% by weight of the composition, but will typicallycomprise less than about 2% by weight, and will preferably will compriseless than 1% by weight, more preferably less than 0.5% by weight, andideally less than 0.1% by weight of the total composition.

In one embodiment, the composition will be free or substantially free ofcationic hair conditioning agents. By substantially free of cationichair conditioning agents is meant that the compositions comprise lessthan 0.5% by weight, preferably, less than 0.25% by weight, and morepreferred still, less than 0.1% by weight cationic conditioning agents.

In other embodiments the compositions may contain an amount of cationic(quaternium) ingredients that are anhydrous or have very low level ofwater, e.g., less than 1% by weight. Suitable quaternium compoundsinclude, without limitation, Polyquaternium-37 (INCI),Cyclopentasiloxane and Silicone Quaternium-18 (INCI), PEG-2Dimeadowfoamamidoethylmonium Methosulfate and Hexylene Glycol (INCI),and Cetrimonium Chloride (INCI), to name a few. Such quaterniumcompounds, if present, will typically comprise from about 0.05% to about1.5% by weight of the total composition, and more typically, from about0.1% to about 1% by weight.

The composition of the present invention may be formulated in anysuitable form, including various rinse-off and leave-in formulations,such as but not limited to shampoos, conditioners, serums, creams,sprays, emulsions, gels, balms, liquids, dispersions, and the like.

In one embodiment, the compositions may be formulated for pump oraerosol delivery to the hair. When formulated for aerosol delivery, apropellant will be included which is suitable for delivery of thecomposition onto the hair. Suitable propellants include, withoutlimitation, n-butane, isobutane, and isobutane/propane, nitrogen, carbondioxide, compressed air, nitrous oxide, 1,2-difluoroethane,1,1-difluoroethane, 1,1,1,2-tetrafluoroethane, dimethyl ether,

In one embodiment, a product is provided comprising an aerosol deviceincluding a container fitted with an dispenser, such as a dispensingvalve, for dispensing the aerosol composition from the container. Thecontainer is charged with the composition according to the invention(e.g., comprising one or more particulate materials, one or more filmformers, and volatile solvent). A suitable propellant may be included inthe container with the inventive composition or may be included in asecond container in a dual-chamber-type aerosol device. When thepropellant is included in the container with the other ingredients, itwill typically be present from about 20% to about 50%, by weight of thecomposition including propellant.

Particularly deleterious to the prevention and reduction of frizzyappearance in hair and the reduction of fly-away strands of hair arenon-volatile water-soluble or water-dispersible components which maycoat or mask the particulates on the surface of the hair, or which mayattract or bind water, such as propylene glycol or glycerin. Preferably,the collective amount of such non-volatile water-soluble orwater-dispersible components in the composition will be below about 15%,below about 10%, below about 5%, below about 2.5%, below about 1%, belowabout 0.5%, below about 0.25%, below about 0.1%, or below about 0.05%,based on the total weight of the composition. In some embodiments, thecompositions are free of non-volatile water-soluble or water-dispersiblecomponents, and in particular, free of liquid water-soluble orwater-dispersible components.

Other optional ingredients include, without limitation, siliconeelastomers which may be incorporated to provide conditioning propertiesto the hair or improve the tactile properties of the film. Siliconeelastomers are crosslinked flexible silicones that can undergo largereversible deformations. Such elastomers may be formed, for example, byplatinum metal catalyzed reactions between SiH containingdiorganopolysiloxanes and organopolysiloxanes having silicon bondedvinyl groups. Suitable silicone elastomers include dimethicone/vinyldimethicone crosspolymers, vinyl dimethicone/methicone silsesquioxanecrosspolymers, and dimethicone/phenyl vinyl dimethicone crosspolymers.Examples include Dow Corning 9040, 9041, and 9506, and Shin-Etsu KSG-15,16, and 17, and Shin-Etsu KSP-100, 101, 102, 103, 104, 105, 200 and 300.The elastomers are preferably present at a concentration of 0.01% to10%, more preferably at a concentration of 0.1% to 5%, and mostpreferably at a concentration of 1% to 3%. Silicone elastomers do notform good films, and are not included in the calculation of the powderto film former ratio. Vinyl dimethicone/Methicone/Silsesquioxanecrosspolymer is one such silicone elastomer that has been foundparticularly useful. Other ingredients that can optionally be presentinclude, without limitation, conditioners (e.g., Polyquaternium-37/PGDicaprylate/Trideceth blend), aesthetic modifiers (e.g., PolymethylMethacrylate spherical powder having a diameter of 4-8 μm), siliconeresins (such as trimethylsiloxysilicate), thickeners (e.g.,PEG-150/decyl alcohol/SMDI copolymer), sunscreens, preservatives,fragrances, etc.

Additional components may be incorporated as fillers or for variousfunctional purposes as is customary in the cosmetic arts. However, whileadditional components consistent to formulate the above cosmeticcompositions may be included, the inclusion of additional ingredients islimited to those ingredients which do not interference with thereduction or prevention of frizzy appearance of hair and the formationof a water vapor resistant film.

Anhydrous compositions of the invention may suitably be prepared bymixing the solvent (e.g., ethanol and cyclomethicone pentamer) with theparticulate materials and the film former, and, if present, the shineenhancer and optional ingredients. There is essentially no restrictionon the order of addition or manner of mixing these components. Thecomposition may be mixed or homogenized at room temperature. It has beenfound useful but not necessary to mill the mixed ingredients which canbe carried out using any suitable technique in the art. For example, aSilversen L4RT mixer operating at 4000 RPM for about 4 minutes has beenfound suitable. Once complete, the composition can be packaged, forexample into a pump spray, or an aerosol spray which is then chargedwith propellant. In certain embodiments where the compositions areemulsions prepared from different phases, each prepared separately, thephases are combined and the emulsion may be formed by mixing or millingat room temperature, or by any other suitable means in the art.

The present invention provides a method for preventing or reducingfrizzy appearance and fly away strands of hair comprising applying to akeratin fiber a hair care composition having a combination of ahydrophobic particulate material and a silicone-based hydrophobic filmformer, in particular, in dry, damaged, or curly hair. As used hereindamaged hair any type of hair fibers that suffer from deleteriouseffects to appearance, feel or strength of the hair, including colortreated hair as the dying process frequently results in damage to feeland strength of the hair fibers. However, the invention is not limitedto application dry, damaged, or curly hair. The methods and compositionsmay be, applied to any hair, including fine hair, to reduce or preventfrizzy appearance and impart a water-resistant film on the keratinfiber.

The inventive composition may be applied onto dry hair or wet hair. Thecompositions according to the invention are preferably applied to thehair (hair of the scalp, beard, mustache, etc.) to provide resistanceagainst frizzy appearance. More preferably, the inventive compositionmay be distributed across strands of the hair forming a substantiallyuniform coating on the shafts of the hair fibers. The substantiallyuniform distribution may be achieved by spraying the composition acrossthe hair and depositing the composition throughout the hair. Thesubstantially uniform distribution may also be attained by applying thecomposition to the hair by hand and rubbing and spreading with fingersthe composition across the hair. The composition may also be distributedin a substantially uniform manner throughout the hair using a brush or acomb. The composition may be applied to the hair and allowed to remainon the hair. Alternatively, hair treated with the composition may berinsed with water after application of the composition to the hair. Thecomposition can be re-applied at any time, as the consumer desires. Inone embodiment, the composition may be applied daily, every other day,weekly or bi-weekly.

It has been found that the inventive compositions, when applied to thehair, particularly the hair of the scalp, may reduce and/or preventfizzy appearance of hair, reduce unwanted volume, improve consumer'sability to control and maintain hair style (e.g., leaving hair moremanageable or easier to style), reduce the amount of fly-away strands ofhair, improve consumer's ability to obtain well-aligned hair (e.g.,tames and smoothes unruly, frizzy, or flyaway hair), impart a desirablefeel (e.g., soft or smooth) to hair, or improve consumer's ability toretain or extend the hairstyle, or change the volume of hair whenapplied to the hair, particularly the hair of the scalp. Particularly,the present invention imparts these properties to hair and protects fromaesthetically undesirable changes to the hair particularly in humidconditions.

Volume of hair refers to the structural body and space occupied indefined regions of hair tresses and relates to the apparent thickness ofhair by sight and touch, which also relates to the body of the hair.Body can be defined by feel, weight and hair set. Lack of body resultsin hair feeling limp, having less manageability. In some embodiments,the inventive compositions may reduce the volume of hair. For example,the inventive compositions may reduce the volume of hair by at leastabout 50%, at least about 60%, at least about 70%, at least about 75%,at least about 80%, at least 90%, or even at least about 100%. In otherembodiments, the inventive compositions reduce the volume of hair byabout 50% to about 100%, about 65% to about 95%, about 70% to about 90%,or about 75% to about 85%.

The benefits of the present invention may be imparted to the hairimmediately after application of the compositions to the hair and mayendure for a period of time following application of the compositions tothe hair. The benefits may endure for a period of at least 6 hours, atleast 8 hours, at least 12 hours or at least 18 hours. Preferably, thebenefits may endure for an extended period of time. For example, in someembodiments, the benefits endure for at least 24 hours, at least 48hours, at least 3 days, at least 5 days, or at least 1 week. In otherembodiments, the benefits endure semi-permanently, by which is meantthat the benefits endure for more than 1 week. In a preferredembodiment, hair treated with the inventive combination may retain someor all of the benefits identified above, particularly resistance tofrizzy appearance, after at least one shampooing of the hair, by whichis meant a single cycle of wetting, applying shampoo thereto, andrinsing of hair. In a more preferred embodiment, hair treated with theinventive combination may retain some or all of the benefits identifiedabove, particularly resistance to frizzy appearance, after at least two,three, or more shampooings of the hair.

The foregoing may be tested using hair swatches treated with theinventive compositions. Likewise, the compositions may be applied to thehair of a pet, such as a dog, or fur materials, such as a fur coat, toimprove the aesthetics of the hair.

Changes in volume of the hair may be determined on hair tresses usingvarious techniques, including the technique described by C. R. Robbinsand R. J. Crawford in the article “A Method to Evaluate Hair Body,” J.Soc. Cosine. Chem., 35, pp. 369-377 (1984), the disclosure of which ishereby incorporated by reference herein, and modified versions thereof.Other suitable means for evaluating change in volume of hair involvestaking a digital photograph of hair tresses and analyzing thephotographs using an image analysis program, which is a commerciallyavailable testing service known as the Image Analysis Method fromMarTech Personal Care. Another suitable means for evaluating change involume of hair involves pulling a tress of hair through rings ofdifferent radial dimensions and relating the force required for pullingto a measure of volume or body. An exemplary method of this alternativetest is performed using a Dia-Strop Miniaure Tensil Tester 175 andavailable as a commercially available testing service known as theRadial Compression/Ring Method from MarTech Personal Care. Preferably,the change in volume of hair may be examined using, the testing protocoldescribed below.

Hair Volume Test Method

The method consists of preparing fine virgin European brown hair in theform of swatches suitable to attach to a hair holder and a 2 cm ring.Each hair swatch is configured to appropriate weight and length for ringattachment and may be pre-treated by washing the tresses 2 to 3 times.Each of the washed virgin hair swatch is combed 5 times with a large endcontrol comb prior to obtaining any measurements.

To test the volume of a hair tress, the hair swatch is pulled throughthe 2 cm ring at a constant rate. The forces applied to the tresseswhile the hair swatch is pulled through the 2 cm ring is measured usinga Dia-Stron Miniature Tensil Tester 170. The amount of work for pullingeach of the hair swatches through the ring is obtained by calculatingthe area under a curve of the measured forces applied to the hair tressover the length of the hair tress. All such measurements are obtainedfrom dried hair.

Five to six measurement runs (curves) are taken of the washed virginhair tresses before analysis. A baseline value is determined using themean amount of work calculated from the measurements taken from thevirgin tresses. The same hair tresses may then treated with acomposition of the present invention. The treated hair tresses areallowed to dried and subsequently tested in the same manner. Thepercentage increase in volume is determined by comparing the mean amountof work measured from the treated hair tresses to the baseline mean workvalues obtained from the virgin tresses. An increase in work isindicative of an increase in hair volume.

EXAMPLES Example 1

This Example provides compositions for preventing or reducing frizzyappearance of hair. Formulations 1A and 1B were prepared according toTable 1.

TABLE 1 INCI name/description 1A 1B Fumed Alumina (Aeroxide Alu C 805fumed 1.00 1.25 Alumina from Evonik Industries) Dimethiconegum/Cyclopentasiloxane 15/85 2.50 2-40 (SF1214 from KOBO/Momentive)Amodimethicone 2.00 2.66 (SF 1708 from KOBO/Momentive) PerfluorononylDimethicone 1.00 — Dimethicone/Dimethiconol 87/13 — 0.24 (1403 Fluidfrom Dow Corning) Polyquaternium-37/PG Dicaprylate/Trideceth — 0..25.blend PEG-150/decyl alcohol/SMDI copolymer — 0.15 Acrylates/Dimethiconecopolymer/Methyl — 3.00 Trimethicone 40/60 (KP-549 from Shin-Etsu)Alcohol SD 40B anhydrous 22.00 9.70 Water — 25.29 Methyl Methacrylatecrosspolymer 0.10 0.10 (3d tech PW from KOBO) Polymethyl Methacrylatespherical powder 0.10 0.10 having a diameter of 4-8 μm (GanzpearlGM-0600 from Presperse, Inc.) Vinyl dimethicone/Methicone/Silsesquioxane1.00 1.25 crosspolymer (KSP-105 from Shin-Etsu) Octylmethoxy Cinnamate0.80 0.53 Fragrance as needed 0.80 Preservatives as needed 0.80Cyclopentasiloxane 69.50 q.s. (245 fluid from Dow Corning) TOTAL 100.00100.00

Formulation 1A is an exemplary embodiment of an anhydrous formulation.Formulation 1B provides an exemplary embodiment of a shake-well typeemulsion. Emulsifiers may be added to Formulation 1B to provide a longerlasting emulsion or stable emulsion. Suitable emulsifiers includingethoxylated silicone emulsifiers, for example, PEG-10 dimethicone,PEG/PPG-18/18 dimethicone, PEG/PPG-19/19 dimethicone, cetyl PEG/PPG-10/1dimethicone, amongst others.

The invention described and claimed herein is not to be limited in scopeby the specific embodiments herein disclosed since these embodiments areintended as illustrations of several aspects of the invention. Anyequivalent embodiments are intended to be within the scope of thisinvention. Indeed, various modifications of the invention in addition tothose shown and described therein will become apparent to those skilledin the art from the foregoing description. Such modifications are alsointended to fall within the scope of the appended claims. Allpublications cited herein are incorporated by reference in theirentirety.

1. A method for preventing or reducing frizzy appearance of haircomprising applying to the hair a composition comprising: (a) ahydrophobic particulate material having a median particle size betweenabout 10 nm and about 20 μm comprising a hydrophobicallysurface-modified aluminum oxide, said hydrophobic particulate materialcomprising from about 0.1% to about 2.0% by weight of said composition;(b) a silicone-based hydrophobic film former comprising from about 0.5%to about 20% by weight of said composition; and (c) a volatilehydrocarbon or silicone fluid having a vapor pressure above about 0.01mmHg at 20° C.; wherein the aggregate weight percentage of allnon-volatile water-soluble or water-dispersible organic constituents insaid composition is less than 5%, based on the entire weight of thecomposition.
 2. The method according to claim, wherein said aluminumoxide is surface modified with alkylsilane groups.
 3. The methodaccording to claim 2, wherein said alkylsilane is caprylylsilane.
 4. Themethod according to claim 3, wherein said aluminum oxide is fumedalumina.
 5. The method according to claim 1, wherein said aluminum oxideis fumed aluminum oxide that is surface modified with alkylsilanegroups.
 6. The method according to claim 1, wherein said silicone-basedhydrophobic film former comprises dimethicone, amodimethicone,dimethiconol, silicone polyurethane, silicone acrylate, or a combinationthereof.
 7. The method according to claim 6, wherein said silicone-basedhydrophobic film former comprises a silicone acrylate copolymer.
 8. Themethod according to claim 7, wherein said silicone acrylate copolymer isa copolymer comprising a poly(alkyl)acrylate backbone and a dimethiconepolymer grafted to an alkyl ester side chain.
 9. The method according toclaim 1, wherein said composition is in the form of a liquid oremulsion.
 10. The method according to claim 9, wherein the compositionapplied to the hair further comprises ethyl alcohol.
 11. The methodaccording to claim 9, wherein the composition applied to the hair is anemulsion further comprising water.
 12. The method according to claim 9,wherein the composition further comprises ethyl alcohol.
 13. The methodaccording to claim 11, wherein the composition is distributed throughthe hair with a brush, a comb or fingers.
 14. The method according toclaim 13, wherein said composition forms a substantially uniform coatingon the shafts of the hair fibers.
 15. The method according to claim 14,wherein the frizzy appearance of said hair is reduced or preventedfollowing at least one shampooing.
 16. The method according to claim 14,wherein the frizzy appearance of said hair is reduced or preventedfollowing at least two shampooings.
 17. The method according to claim 1,wherein frizz volume of hair is reduced.
 18. The method according toclaim 1, wherein said composition is applied daily to the hair.
 19. Themethod according to claim 1, wherein said composition is applied to thehair when the ambient relative humidity is 85% or above.
 20. The methodaccording to claim 1, wherein the composition comprises said siliconefluid having a vapor pressure above about 0.01 mmHg at 20° C.
 21. Acomposition for preventing or reducing frizzy appearance of haircomprising: (a) a hydrophobic particulate material having a medianparticle size between about 10 nm and about 20 μm comprising ahydrophobically surface-modified aluminum oxide, said hydrophobicparticulate material comprises from about 0.1% to about 2.0% by weightof said composition; (b) a silicone acrylate film former comprising fromabout 0.1% to about 20% by weight of said composition; and (c) asilicone film former comprising from about 0.1% to about 20% by weightof said composition; and (d) a cosmetically acceptable vehiclecomprising a silicone fluid having a vapor pressure above 0.01 mmHg at20 C; wherein the aggregate weight percentage of all non-volatilewater-soluble or water-dispersible organic constituents in saidcomposition is less than 5% based on the entire weight of thecomposition.
 22. The method, according to claim 21, wherein said aluminais fumed alumina.
 23. The method according to claim 21, wherein thesilicone film former is selected from the group consisting ofdimethicone, amodimethicone, dimethiconol, silicone polyurethanes, andcombinations thereof.
 24. The composition according to claim 23, whereinthe volatile silicone is selected from the group comprisingcyclomethicone tetramer, cyclomethicone pentamer, cyclomethiconehexamer, trisiloxane, methyl trimethicone, or combinations thereof. 25.The composition according to claim 21, wherein the vehicle furthercomprises ethyl alcohol.
 26. The composition according to claim 21,wherein the vehicle further comprises water.
 27. The compositionaccording to claim 21, wherein the composition is in the form of anemulsion further comprising an emulsifier.
 28. The composition accordingto claim 27, wherein the emulsion is a water-in-silicone emulsion. 29.The composition according to claim 28, wherein the composition furthercomprises ethyl alcohol.
 30. The composition according to claim 28,wherein said emulsifier comprises an organosiloxane polymer having sidechains comprising -(EO)_(m)- and/or -(PO)_(n)- groups, where the sum ofn and m is about 50 or less, the side chains being terminated withhydrogen or C₁₋₈ alkyl groups.
 31. The composition according to claim28, wherein said emulsifier comprises an emulsifier selected from thegroup consisting of peg10 dimethicone, peg/ppg-18/18 dimethicone,peg/ppg-19/19 dimethicone, and cetyl peg/ppg-10/1 dimethicone.
 32. Thecomposition according to claim 21, further comprising a water solublefilm former.
 33. The composition according to claim 32, wherein thewater soluble film former is a quaternium or polyquaternium.
 34. Thecomposition according to claim 33, wherein the water soluble film formeris polyquaternium is polyquaternium-37 (INCI).
 35. The compositionaccording to claim 24, wherein said silicone acrylate copolymer is acopolymer comprising a poly(alkyl)acrylate backbone and a dimethiconepolymer grafted to an alkyl ester side chain.
 36. The compositionaccording to claim 35, where said silicone film former comprisesdimethicone.
 37. The composition according to claim 35, where saidsilicone film former comprises a silicone gum.
 38. The compositionaccording to claim 35, wherein said alumina is fumed alumina.
 39. Thecomposition according to claim 21, where said composition is anhydrous.